MA37671A1 - Structure with active acoustic openings - Google Patents

Structure with active acoustic openings

Info

Publication number
MA37671A1
MA37671A1 MA37671A MA37671A MA37671A1 MA 37671 A1 MA37671 A1 MA 37671A1 MA 37671 A MA37671 A MA 37671A MA 37671 A MA37671 A MA 37671A MA 37671 A1 MA37671 A1 MA 37671A1
Authority
MA
Morocco
Prior art keywords
septum
acoustic
velocity
response
changes
Prior art date
Application number
MA37671A
Other languages
French (fr)
Other versions
MA37671B1 (en
Inventor
Fumitaka Ichihashi
Original Assignee
Hexcel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hexcel Corp filed Critical Hexcel Corp
Publication of MA37671A1 publication Critical patent/MA37671A1/en
Publication of MA37671B1 publication Critical patent/MA37671B1/en

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4957—Sound device making

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Headphones And Earphones (AREA)

Abstract

L'invention concerne une structure acoustique qui comprend un septum ayant une ouverture acoustique, qui définit une zone ouverte qui varie en réponse à des changements de la vitesse de milieux contenant du bruit passant dans l'ouverture acoustique. Le septum comprend une partie fixe et une ou plusieurs parties volets mobiles, la partie fixe et/ou la ou les parties volets comprenant des surfaces qui définissent une ouverture acoustique à travers le septum. L'ouverture acoustique présente une zone ouverte qui varie en raison du mouvement du ou des volets mobiles en réponse aux changements de vitesse des milieux contenant du bruit qui passent à travers l'ouverture acoustique. Le septum résultant présente un facteur de non linéarité (nlf) relativement faible.An acoustic structure includes a septum having an acoustic aperture, which defines an open area that varies in response to changes in the velocity of media containing noise passing through the acoustic aperture. The septum includes a fixed portion and one or more movable flap portions, the fixed portion and / or the flap portion (s) including surfaces that define an acoustic aperture through the septum. The acoustic opening has an open area that varies due to movement of the movable flap (s) in response to changes in velocity of the noise-containing media passing through the acoustic opening. The resulting septum has a relatively low nonlinearity factor (nlf).

MA37671A 2012-06-26 2014-12-19 Structure with active acoustic openings MA37671B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13/533,668 US8800714B2 (en) 2012-06-26 2012-06-26 Structure with active acoustic openings
PCT/US2013/046591 WO2014004215A1 (en) 2012-06-26 2013-06-19 Structure with active acoustic openings

Publications (2)

Publication Number Publication Date
MA37671A1 true MA37671A1 (en) 2016-01-29
MA37671B1 MA37671B1 (en) 2016-10-31

Family

ID=48748520

Family Applications (1)

Application Number Title Priority Date Filing Date
MA37671A MA37671B1 (en) 2012-06-26 2014-12-19 Structure with active acoustic openings

Country Status (12)

Country Link
US (1) US8800714B2 (en)
EP (1) EP2864979B1 (en)
JP (1) JP6284526B2 (en)
KR (1) KR102044680B1 (en)
CN (1) CN104364840B (en)
BR (1) BR112014032248A2 (en)
CA (1) CA2873117C (en)
ES (1) ES2753997T3 (en)
MA (1) MA37671B1 (en)
MY (1) MY167288A (en)
RU (1) RU2632252C2 (en)
WO (1) WO2014004215A1 (en)

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WO2016164043A1 (en) * 2015-04-10 2016-10-13 Mra Systems, Inc. Acoustic liner and method of constructing an acoustic liner
US9469985B1 (en) * 2015-05-11 2016-10-18 Hexcel Corporation Acoustic structures with multiple degrees of freedom
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US10626799B2 (en) * 2017-07-19 2020-04-21 Hexcel Corporation Flexible acoustic honeycomb
FR3070438B1 (en) * 2017-08-25 2020-09-11 Safran Nacelles ALVEOLAR STRUCTURE AND ACOUSTIC MITIGATION DEVICE FOR AIRCRAFT PROPULSIVE GROUP NACELLE
US11052633B2 (en) 2018-05-17 2021-07-06 Safran Cabin Inc. Honeycomb core with improved acoustic properties and method for making same
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Also Published As

Publication number Publication date
EP2864979B1 (en) 2019-09-18
US20130341119A1 (en) 2013-12-26
MY167288A (en) 2018-08-15
US8800714B2 (en) 2014-08-12
BR112014032248A2 (en) 2017-06-27
RU2014152068A (en) 2016-08-20
JP2015528080A (en) 2015-09-24
MA37671B1 (en) 2016-10-31
CN104364840A (en) 2015-02-18
WO2014004215A1 (en) 2014-01-03
CA2873117C (en) 2016-05-17
CA2873117A1 (en) 2014-01-03
RU2632252C2 (en) 2017-10-03
KR102044680B1 (en) 2019-11-14
CN104364840B (en) 2017-08-18
EP2864979A1 (en) 2015-04-29
JP6284526B2 (en) 2018-02-28
KR20150027260A (en) 2015-03-11
ES2753997T3 (en) 2020-04-15

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